- One run per host: start_run claims every host it touches (addresses read
from the inventory Steward wrote; a source's own inventory file is claimed
as that file) before it takes a run slot. The claim is all-or-nothing. A run
waiting on a host shows queued and names the run it waits for, honours a
cancel, and fails after HOST_WAIT_SECONDS (1 h) with which host and run.
- A due schedule whose previous run is still queued or running skips the
firing: last_run_at moves on, last_run_id still names the run going, and
last_error says "Skipped: the previous run was still going". The Schedules
page shows that beside the run (muted), and a launch error in red.
- An alert rule that fires while the action run from an earlier firing is
still going starts no new run; the event says so and names the run. An
in-process set closes the gap between the check and the run being linked.
- docs/core/ansible.md: queued/cancelled statuses and the overlap rules.
Tests: tests/core/test_ansible_overlap.py (claim keys, waiting, all-or-nothing,
cancel, deadline) and tests/integration/test_ansible_overlap.py (two real
runs on one host take turns; schedule skip then fire; alert action skip then
start).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Adds cron-like recurring runs (the engine the maintenance-automation work
needs). New AnsibleSchedule model + migration 0018; a core ScheduledTask
(ansible_scheduled_runs, 60s) fires due schedules, each creating a
system-triggered AnsibleRun (triggered_by=None). Centralises the
resolve-inventory → create-run → launch flow in ansible/runner.trigger_run,
shared by the manual route (refactored to use it) and the scheduler.
Schedules UI under /ansible/schedules: create/edit/pause/delete/run-now,
with interval presets, scope targeting (all / group / target), extra-vars /
limit / tags / dry-run, and last-run status (resolved via last_run_id) +
next-run. Unit test for the due-check.
Task #549 (milestone #37).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>